"She always stood out in my mind as someone very unique and different," he said. "She tapped into my inner nerd, which I loved, but I was afraid that she was putting me in the 'friend zone' because every time I tried to show her affection, it didn't feel like she would reciprocate.

"Anyway, I was surprised when Catherine gave me the card with a kiss of lipstick on it. I'd call that 'aggressive friend zone'."

Lowe continued: "She told me she wanted to kiss me but couldn't while the other girls were in sight. She was so nervous that she buried her head in my chest and wouldn't look up. After a few seconds I told her, 'It's okay to look up', and then we had our first kiss."

The 29-year-old explained that Bachelor fans didn't see Catherine's "excitement" after the smooch, saying: "She was giddy and suggested that we frolic - definitely the first time I received that request, so I obliged. We skipped around the driveway... and then played Dungeons and Dragons (not really)."